Comparative study of nickel selenide, iron selenide and platinum on triiodide reduction for dye-sensitized solar cells
Document Type
Article
Publication Date
1-1-2022
Abstract
In this work, nickel selenide (NiSe2) and iron selenide (FeSe2) were synthesized by a simple and mild hydrothermal method. The selenides were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM). XRD and EDX studies show the compositions of the products. The NiSe2 presents an irregular flaky-like structure whereas the FeSe2 forms a non-uniform rods structure. The catalytic effects of NiSe2 and FeSe2 in comparison to Pt were examined by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The FeSe2 exhibits the highest catalytic activity and the lowest charge transfer resistance, followed by Pt and NiSe2. The photovoltaic and long-run performance of dye-sensitized solar cells (DSSCs) with poly(ε-caprolactone) (PCL)-dimethylformamide (DMF)-potassium iodide (KI) gel polymer electrolytes were investigated with respect to NiSe2, FeSe2 and Pt counter electrodes. The efficiencies attained for NiSe2, FeSe2 and Pt counter electrodes are 6.05, 7.20 and 6.99, respectively. The FeSe2 demonstrates better corrosion resistance to the iodide/triiodide (I−/I3−) electrolyte than Pt. © 2021 The Author(s)
Keywords
Catalyst activity, Charge transfer, Corrosion resistance, Cyclic voltammetry, Dimethylformamide, Electrochemical impedance spectroscopy, Electrodes, Energy dispersive spectroscopy, Field emission microscopes, High resolution transmission electron microscopy, Iron compounds, Nickel compounds, Organic solvents, Polyelectrolytes, Potassium hydroxide, Scanning electron microscopy, Selenium compounds, Solar power generation, Solid electrolytes, X ray diffraction, reductions, Comparatives studies, Counter electrodes, Dye- sensitized solar cells, Energy dispersive X ray spectroscopy, Mild hydrothermal method, Selenides, Simple++, Synthesised, X- ray diffractions, Dye-sensitized solar cells
Divisions
CHEMISTRY
Funders
Ministry of Higher Education, Malaysia [011/2019]
Publication Title
Optical Materials: X
Volume
13
Publisher
Elsevier B.V.
Additional Information
Cited by: 4; All Open Access, Gold Open Access